<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    img{
         margin-left: auto;
         margin-right: auto;  
        display: block;
    }
    a{
            display: block;
            width:100px;
            height: 100px;
            background-color: red;
            margin-left: auto;
            margin-right: auto;
        }
    </style>
</head>
<body>
    <img src="../study/A_OwZWQ68zSTMAAAAAAAAAAABkARQnAQ.png" alt="">
    <a href="">a</a>
</body>
</html>